Sound reproducing diaphragm



De@ 1, l931- c. RYPlNsKl I 1&834129'1 Y SOUND REPRODUC ING DIAPHRAGM Filed Nov. 2, 1927 zsneetsvshnr 1 l INVENTOR. jf/Oz'zs,

M. C. RYPINSKI SOUND REPRODUC ING DIAPHRAGM Fiied Nov.

2, 1927 2 Sheets-Sheet 2 INVENToR. 'YZ S'Z;

j yg/m ATTORNEY Patented Dec. 1, 1.931l

` MAURICE o. RYPINsxI, or nAs'T omen, NEW JERSEY, AssIeNoRmo nRANDEs Lmo- RATORIES, INC., OF NEWARK, NEW JERSEY, A CORPORATION NEW' i SOUND nEnonUoING 'DIAPHRAGM Application mea November 2 1927. serial No. 230,642.

My invention relates broadly to sound reproducing apparatus and more particularly to a construction of a sound-reproducing dia- Y phragm.

5 One of the objects `of myinvention is vto provide a conical shaped sound reproducing diaphragm of the free edge type having a high degree of rigidity and arranged for the reproduction of musical notes over a broad frequency range. Y Y

Another object of'my invention is to provide a conical shaped sound reproducing diaphragm of metallicV material having means 1 for mounting the diaphragm in such manner` that the peripheral edge is free of any positive form of rim support. f

Still another object of my invention is-to provide a conical shaped sound reproducing diaphragm constructed of Y thin sheet metal with Wire members extending from the apex thereof and forming centering means for the conical shaped sound reproducing diaphragm with respect to an apertured member through Which sound is arranged to emanate.

sides in the construction of a conical shaped sound reproducing diaphragm fromv thin metal such as beryllium, aluminum,y mag-'- nesium or other light metal having a free peripheral edge and supportedfrom the apex of the conical shaped diaphragm for the reproduction of sound over the entire musical scale.

My inventionwill be more fully under" stood from the specification hereinafter following by `reference to the accompanying drawings in which.: Y.

Figure 1 is a side elevation of the conical shaped sound reproducing diaphragm of my invention; Fig. 2 is a front vievs7 of the sound reproducing diaphragm; and 3 is a fragmentary view showing the manner in which j the centeringwires are attached to thebody structure of the sound reproducing diaphragm. y Y

My invention relates to thatclass of conical shaped sound reproducing diaphragms which are supported from the apex of the diap. phragm and properly centered With respect to a sound aperture in such manner that sound A still further ob]ect of myV invention revibrations imparted to the apex of the sound di" good tone quality. f f

Ihavefo'un'd that'thin metal, such as beryllium may be used in `makingy the conical vshaped sound reproducingdiaphragm. This .material lmay be very thin, preferably one quarter of one mil. Beryllium isy a metal onethird lighter than aluminum and `one-fourth more elastic than steel, and is capable Y of manufacture by electro-deposition- The cone structure when made of beryllium is actually lighter than a similar structure made 0f paper, as'heretofore usedin the art. A cone diaphragm of berylliumhas several advan'- tages over: a paper diaphragm, for it is no t subject to Vatmospheric conditions in the Way thatthe usual fibrous mounted paper diaphragms are. The cone diaphragm of my invention is capable of being made in onepiecy by the electrolytic method. The diaphragm vis-of `such light Weight that it may be readily supportedfrom theY apex and centered by meansof Wire members which may also be of beryllium, preferably but three mils in direproducing diaphragm are reproduced with fameter. The Wire members are` laid upon the surface of the cone shapeddiaphragm and r'substantially rconform to the surface thereof and extend from the apex beyond lthe, periphv `eral Vedgefand are secured toasuitable frame With ,respectv to Which the diaphragm may bemounted.. i ,i f i Referring to the drawings in `more detail, reference character 1 represents an electromagnetic driver -With a rodmember 2 pro- `jecting therefrom. Rod member 2 is driven from'the vibrating armature ofthe electro- Vmagnetic driver l and` carries apex pieces 3 and dat the end thereof betweenwhich the yconical' shaped diaphragm 5 is mounted. Theconical shaped diaphragm 5 is composed ofelectrolytically deposited beryllium in one l.piece and is not seamed along one side, ,as

is generally the case with paper cones.v j The conefof beryllium represented at 5 has afree Vperipheral.'edge 6, Which is positionedradjacent an aperture in the frame 8. Themate rial of the cone 5 is provided with inwardly ceiving the wire members 10 which extend from the apex pieces along the slant height of the cone 5 and beyond the peripheral edge thereof as represented at 11. The wire members at 11 pass through the frame 8 at an angle as represented at 12 and around the front of the frame 8 as shown at 13, and are turned back into the frame as represented at 14. The wire lnembers are thus hooked into the frame and serve to center the sound rcproducing diaphragm with respect to the frame. rIlhe wire members are secured to the body of the cone by asuitable cement which has been illustrated at l5.

I have described the conical shaped sound reproducing diaphragm as preferably made from beryllium, but I desire it to be understood that other light weight materials may be used, such as magnesium and aluminum.

While I have described my invention in one of its preferred embodiments, I desire that itbe understood that modifications may be made and that no limitations are intended other than are imposed by the scope of the appended claims. Y

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A sound reproducing diaphragm comprising a conical shaped sheet of thin metallic material, ribs formed in said material at spaced intervals and wire members located in said ribs and extending beyond the peripheral edge of said diaphragm, and means connected to said wire members for centering said diaphragm.

2. A sound reproducing diaphragm comprising a conical shaped sheet of metallic material, means for mounting said'diapliragm from the apex thereof and imparting sound vibrations thereto, and wire members laid on the surface of said diaphragm and extending in the plane of said diaphragm beyond the peripheraledge thereof, a frame member and a connection between said frame member and the ends of said wire members for centering said diaphragm with respect to said frame member.

3. A sound reproducing diaphragm comprising a conical shaped sheet of metallic material, means for supporting said conical shaped sheet of material from the apex thereof and imparting sound vibrations thereto, said sheet of metallic material being depressed along the slant height thereof, and wire members extending in the plane of said diaphragm from the apex of said diaphragm along the depressions in the surface of the diaphragm and beyond the peripheral edge of the diaphragm, and means connected to said wire members for centering said diaphragm. 4. A sound reproducing diaphragm com-` prising a'conical shaped sheet of material, means for supporting said conical shaped MAURICE C. RYPINSKI. 

